qede: sync udp_tunnel ports outside qede_lock in the recovery path
In the Linux kernel, the following vulnerability has been resolved: qede: sync udp_tunnel ports outside qede_lock in the recovery path A TX timeout on a qede NIC that has VXLAN/GENEVE tunnel ports configured wedges the rtnetlink control plane of the whole machine: NETDEV WATCHDOG: ens6f1 (qede): transmit queue 2 timed out 10226 ms [qede_tx_timeout:586(ens6f1)]TX timeout on queue 2! [qede_recovery_handler:2665(ens6f0)]Starting a recovery process The recovery path deadlocks on the driver's own mutex: qede_sp_task rtnl_lock() mutex_lock(&edev->qede_lock) <- taken qede_recovery_handler qede_load udp_tunnel_nic_reset_ntf __udp_tunnel_nic_device_sync info->sync_table == qede_udp_tunnel_sync mutex_lock(&edev->qede_lock) <- same task: deadlock The mutex is not recursive, so the kworker blocks on itself with rtnl_lock held, and neither lock is ever released. Every task that calls rtnl_lock() afterwards (ip, ovs-vswitchd, lldpad, IPv6 addrconf, sshd) blocks forever while the node still answers ping. In a vmcore from an affected production node rtnl_mutex.owner decodes to the very kworker blocked at the innermost mutex_lock() above. Re-sync the tunnel ports from qede_sp_task() after the internal lock is dropped, still under rtnl_lock as the udp_tunnel API requires. This mirrors qede_open(), which calls udp_tunnel_nic_reset_ntf() under rtnl without the internal lock. qede_recovery_handler() now returns whether it has successfully reloaded an open device, and the caller re-syncs the ports
CVE-2026-74523
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-74523
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "19e505ee8bb9e0f0355eda9e9f614fb25fed0070",
"versionType": "git"
},
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "c4c1e5d6bc2b900b2328d6fff93dc8146b858d69",
"versionType": "git"
},
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "8e1bdf57de91247e57816482966265ada573cc74",
"versionType": "git"
},
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "e382a4efeeae6555b95d9ff336cf3094ee7d336b",
"versionType": "git"
},
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "4626df3f63c9185efba5750fe76ac01ab3351bae",
"versionType": "git"
},
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "e51becb8f3377a377171ed5bf0082b96e22e6292",
"versionType": "git"
},
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27",
"versionType": "git"
},
{
"status": "affected",
"version": "8cd160a29415f1789d473b1dc07fcc9d02a02b87",
"lessThan": "451c9075d6c53f2438d110addbeeeea6fac18567",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/qlogic/qede/qede_main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/qlogic/qede/qede_main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74523
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33195 · Revision 1
- Added to Heist Feed
- Publisher date